Plug for tobacco pipes



April 29, 1930. R. H. TICKELL 1,756,890

PLUG FOR TOBAOCO PIPES Filed Nov. 19, 1928 Patented Apr. 29, 1930 UNITED STATES PLUG FOR TOBACCO PIPES Application filed November 19, 1928, Serial No. 820,470, and in Great Britain December 6, 1927.

This invention relates to tobacco pipes of the type having a removable plug in the form of a serrated disc adapted to be placed near the bottom of the bowl of the pipe for the purpose of intercepting deleterious matters.

According to this invention the plug is in the form of a disc of non-absorbent or slightly absorbent material, such as cardboard, coated on one or both sides with some absorbent material such blotting paper or felt. The plug is of a flat disc form, substantially circular and perforated in the centre with several holes, the edge being serrated.

The peripheral portion of the plug being flexible owing to the serrations will bend, the

- disc form of the plug becoming cup-form when inserted in the bowl of a pipe whose bore is of a diameter less than that of the plug. The plug is therefore suitable for pipes of almost any diameter, and being of cheap material can be thrown away and replaced each time the pipe is used for smoking.

It has previously been proposed to use a metal disc coated with asbestos.

The invention is illustrated in the annexed drawings, in 'which Fig. 1 is a vertical section of a complete pipe in accordance with the present invention.

Fig. 2 is a section of a bowl of smaller interior cross section than that of Fig. 1.

Fig. 3 is a detail plan view on a larger scale of a plug, and

F ig. 4 is a sectional view of a plug showing the facing material.

As shown in Figs. 3 and 4, the plug a, which is preferably made of cardboard or other suitable nonabsorbent or slightly absorbent material, is in the form of a fiat disc. In order that this plug may accommodate itself to bowls of varying internal cross section the edges of the disc are serrated as shown at b. In the case of the bowl shown in Fig. 1, the plug is inserted with the serrations lying fiat, that is in the same horizontal plane as the remainder of the plug, but in the case of the smaller bowl illustrated in Fig. 2 the serrations are bent upwardly so that the diameter of the plug is reduced.

The plug of cardboard or other non-absorbent or only slightly absorbent material is faced on one or both sides with some ab sorbent material such as blotting paper or felt as shown at c, Fig. 4.

The plug is perforated at intervals as shown at d. The object of coating the plug on both sides is that it is then immaterial WhlCh side of the plug faces upwards when inserted in the bowl.

Having thus described the nature of the said invention and the best means I know of carrying the same into practical effect, I claim An absorbent, removable spacing plug for insertion in the bowl of the tobacco pipe, comprising a dentated, perforateddisc of substantially non-absorbent material coated with absorbent material.

In testimony whereof I have signed my name to this specification.

RICHARD HUGH TICKELL.

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